09-12-2014, 01:16 AM | #183 |
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LOL no.
Not wanting to "give it away", but it essentially boils down to an extremely efficient turbo system that would reduce friction and lost energy. Now as far as his claim on not stressing internals...I don't see it being able to do that. But more efficient engines/turbo systems are doable. But I also think it goes into the classic car guy saying... Speed, inexpensive, reliable... Pick two. Also my point is...of course someone who can fabricate parts them self or they work at a junkyard and can get parts for super cheap...yeah they can do things for cheaper than a guy who does not have those alternatives. While in military...I got to fire all kinds of big weapons for "free". That doesn't mean that if I want to unload with an M-60 or a SAW (think belt-fed M-16) for an hour...it will cost me a lot in rental fees and in ammo. The whole, "build a twin to be a Z06 beater" falls into that same thing. Sure, if you dad is the guy who runs Cobb tuning...I bet you can get a "deal". Just like how CJSporl can keep dumping money into his BRZ...some people just have more options for various reasons. |
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09-12-2014, 07:18 AM | #184 |
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I re-tooled at home, my Huffy has become a Ducati killer.
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09-12-2014, 12:06 PM | #185 | |
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Quote:
In addition, modern turbos run at or near their peak efficiency point already run at >75% efficiency. Sure, a really good axial compressor can maybe do better (although I'm not convinced of that - see the next paragraph for details), but you're trading off a lot of complexity and cost to achieve that. An axial flow compressor can only achieve a pressure ratio of 1.2-1.3 or so per stage, you'll need a 3-5 stage axial compressor to get 15-20psi of boost. Efficiency is highly dependent on tip clearance too, which will require some pretty high end materials and machining (since you want to maintain as close to zero tip clearance as possible while spinning at very high speeds and across a wide range of temperatures). In addition, although in large applications (jet engines, power plants), axial compressors are without question more efficient than centrifugal, I'm not convinced that's the case for small ones. Issues with achieving the right spin speed and tip clearance on a small compressor can wipe out almost all of your efficiency gains, and you also have a much longer driveshaft to balance and support at extreme RPM (and if it starts flexing, you can crash your blades into the housing, since you want as little blade clearance as possible for efficiency). The physical size of an axial compressor is also a lot larger than a centrifugal for the same flow and pressure ratio. These factors are enough of a problem even on larger engines that many smaller turbine engines (especially helicopter and turboprop engines) actually still use centrifugal compressors. The Pratt and Whitney PT6 is a good example of this. That having been said, if you do get around to making this design work, I'd be curious to see pictures/details. Even though I doubt the gain is worth the amount of effort it will take, it still sounds like a fun engineering project. |
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09-12-2014, 12:56 PM | #186 | |
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The axial compressor, was NOT what I was referring to..
Quote:
It's an entirely different project. Jaden |
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09-12-2014, 01:06 PM | #187 |
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Is it a comprex? lol
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09-12-2014, 01:35 PM | #188 |
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I made a huffy a Ducati Killer...
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09-12-2014, 10:04 PM | #189 |
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For all you Z06 lovers and engine-swap-haters out there... look up some of these fabulous builds: @JoeDrifter @jet86 @Drift&Drag @WTF @slicktop @puma @OmarGC @SmsAlSuwaidi @FullBlown |
09-13-2014, 12:58 AM | #190 | |
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Quote:
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09-13-2014, 01:53 AM | #191 |
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Fwiw, the article I recall had an Evo with about $12k in mods beat a stock GTR round the track.
Twins are obviously superior to any low mileage C7's with blown engines, faulty brakes and airbags. Go GM! /thread |
09-13-2014, 02:58 AM | #192 |
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Here's my c7 z51 (not z06 but who cares), and my frs.
Both are amazing cars. The only point I'm going to make about these cars is this: The frs is liked more by guys, and the corvette is liked more by the ladies. No matter what modifications you do to your frs, it's probably not gonna pull much ***** compared to the corvette (unless you like high school girls). Let's not forget about resale value and all that junk. The frs, no matter how much money you put into it, will never be even a base model c7 stingray. They feel totally different in good ways. Anyway, enjoy the hurt feelings.
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09-13-2014, 10:16 AM | #193 |
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You have to laugh at all the ignorant GM haters who never owned one or even drove one complain about them and compare them..
Having owned several late model vettes, including 2 Z06's. I can tell you from experience that these are awesome machines that are in another league than the twins. They have a much higher mechanical grip and the power to utilize it. The suspension is far more sophisticated with braking to match. The LSx engines are bullet proof and get descent mileage especially considering the power levels. They have torque everywhere at any rpm.. A torque tube houses the driveshaft And makes the car extremely rigid.. And it's not a unibody, but a full frame.. No flexing anywhere.. For those who don't like the body style... Just have a look underneath the car.. It's really pretty under there with a double wishbone SLA setup, aluminum suspension pieces.. You can see where the money was spent.. It's more racecar than car.. Many don't realize how well vettes hold their value.. These cars are very inexpensive to own over the course of ownership.. My vettes cost me a little more to own than my wife's Hondas over the years.. Except for the cost of tires.. These cars are extremely and surprising inexpensive to own.. World class machines at a reasonable price.. I love my FRS for its simplicity and minimalistic design.. It's a better car to drive in the real world as an everyday DD.. But it's no match for the performance limits of the vette.. |
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09-13-2014, 11:51 PM | #194 | |
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Quote:
http://www.motorauthority.com/news/1...rolet-corvette |
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09-14-2014, 12:11 AM | #195 | |
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Twins vs 2015 z06
Quote:
How many factory defects do the twins have? It's in it's second model year and people are still having problems. Same story and no one cares. No hate on the twins....I've had my frs since June 1 2012 and have enjoyed it as much as my c7, especially since the frs is supercharged. Either way, you can't compare the twins to a new vette....base, Z51, or Z06. Edit: Mine is a 2014 model year c7, so it's not plagued with the issues you've stated above, or any issues at all with mine.
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09-14-2014, 12:29 AM | #196 |
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You have to laugh at all the Corvette owners that claim they never have issues at all. I'd say anyone who could stand sitting in the interior of a C6 or older already has a low bar and high tolerance for piss poor quality.
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